SAE 30 mono-grade oil formulated specifically to meet the critical lubrication needs of new engines during break-in while allowing proper seating of rings and component ‘run-in’. Enhanced levels of “zinc” (zinc dialkyldithiophosphate a.k.a. ZDDP) and superior oil film strength from Penn Grade™ base oils offer complete anti-wear, anti-scuffing protection for even the most demanding of applications such as those presented by break-in of engines with ‘flat tappet’ cams.